Measurement and Instrumentation
Which of following statement are correct in case of power factor meter?

 Both B and C.
 It consist of two coils mounted at right angles to each other.
 The deflection is proportional to phase angle between field coil and crossed coil.
 The restoring torque is provided by a controlling torque.

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Measurement and Instrumentation
Which of following is not correct?

 An ammeter should have a very low resitance.
  An electronic voltmeter draw appreciable current from the source.
 Voltmeter should have very high resistance.
 A shunt should have a very low resistance.

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